In a new sneak peek from the episode, airing Aug. 18, Winfrey is seen asking Lohan point-blank, "Are you an addict?" Winfrey then goes one step further: "What does it feel like to be both an adjective and a verb for child-star gone wrong?"
Lohan's sit-down with Winfrey is one of her first interviews since leaving court-ordered rehab on July 31. She also taped an appearance on Chelsea Lately, which airs Monday.
Lohan's interview with Winfrey is just the beginning. Lohan, 27, will star in an eight-part documentary series airing next year on OWN.
Oprah's Next Chapter airs Sunday, Aug. 18 at 9/8c on OWN. Will you watch?